Automatic regulator for ovens.



I. P. PARMER.

AUTOMATIC REGULATOR FOR OVENS.

APPLICATION FILED AUG. 31. 1904.

ii l 6 mm ...,...|..||||mlHHH Wifgesscs P ATENTED APR. 3, 1906.

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UNITED STATES PATENT OFFICE.-

Specification of Letters Patent.

Patented April 3, 190d.

Application filed August-31, 1904; flerial No. 222,887.

Tow whom it may concern.-

Be it known that 1, JOHN PLFARMER, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Automatic Regulator for Ovens, of which the following is a specification.

This invention relates to' regulators for ovens; and it has for its object to provide an improved contrivance whereby the degree of heat within the oven may be automatically regulated and maintained at a'predetermined point for the pur ose of preventing overheating and the scorching and burningof the con- ;ients of the oven which is apt to result there- With these and other objects in view my invention consists in the im roved construe tion, arran ement, and com ination of arts, which will e hereinafter fully describe and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a perspective view showing one form of my 'improvedregulating device. applied to an ordinary oven-door. Fig. 2is a vertical transverse sectional view of the same. I

Corresponding parts in both figures are indicated by similar numerals of reference.

, My invention includes a thermostat and a damper or valve operated thereby, the thermostat being actuated by increase of heat within the oven-to open the valve or damper for the escape of excessive heat, While a re duction of temperature below a predetermined point will operate to effect the closure of the valve or damper.

The invention is applied to the door of an ordinary oven. When/the invention is thus applied, a thermostat (designated 1) is connected, by means of screws or bolts 2, to the lower ledge 3 of the oven-door, between the bulging front of said oven-door and the lining 5. Injcases where such lining is lacking in the oven-doorit is preferably supplied for the pur ose of 1preventing access to and meddling wit the t ermo tat. The lining-plate 5 is preferably provi ed with a plurality of openings 6, and thefront of the oven-door is provided with a slot, as 7, adapted to be closed by means of a valve or dam er 8, having a dependin lip 9 for the reception of a pivotal pin or bo t 10. p The free or movable end of the dam er is preferably confined by means of a gui e-stri'p 11, secured to the oven-door in order to cause it tomove smoothly and easily. The damper 8 is provided with a forweirdly-projecting pin 12, engaging the-free end 0 t e thermostat in such a manner that when expanded by heat said thermostat shall operate to open the damper, and vice versa.

The device is simple, easily applied, and eificient for the purposes for which it is provided.

Havingi thus described the invention, what is claims is---- .In a device of the class described, an ovendoor having a ledge or flange and provided with an aperture, a damper supported pivotally adjacent to the aperture and normally covering the same, said dam er being provided with a projection, a iliermostat secured upon the led e of the oven-door, extending into the pat of the projection of the damper and sup orting the latter, a strip connected with tl ie oven-door and confinin and guiding the free end of the damper, an a lining'consisting of an apertured plate combining with the door to form a casing for the thermostat.

In testimony that I claim the foregoing as 'my own I have hereto affixed my signature in the presence of two witnesses.

JOHN P. FARMER.

Witnesses:

A. F. FLEGEL, WM. T. More. 

